Effect of different class II correctors on the TMJ

Not Applicable

• Conditions: Skeletal Class II malocclusion wirh retrognathic mandible.; Encounter for fitting and adjustment of orthodontic device; Z46.4

• Registration Number: IRCT20211003052655N1
• Lead Sponsor: Hawler Medical University

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Last Update Posted: 27 May 2024

Recruitment & Eligibility

• Status: Complete
• Sex: All
• Target Recruitment: 39

Inclusion Criteria

Clinical manifestation of a retrognathic mandible, as determined by cephalometric study, with an ANB angle larger than 4?, due to the retrognathic mandible [SNB angle < 78?]
Permanent dentition with angle Class II division 1 malocclusion with no missing or history of extraction.
Patients without history of TMJ dislocation or pain.
No history of orthodontic treatment.
Complete treatment records [cephalometric and panoramic X-ray, photography, and digital study models].
Absence of transverse pre-treatment discrepancy.
Non-extraction treatment strategy and Class I occlusal relationship following treatment.
Cervical vertebrae maturation stages 4,5, and/or 6 in healthy pro-pubertal patients

Exclusion Criteria

Patients having a history of trauma or TMJ operations, severe TMDs, systemic issues such as pregnancy, former orthodontic treatment, claustrophobia, or dental appliances or restorations that could have compromised patient safety during an MRI scan were not included in the study.

Study & Design

• Study Type: interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Disc size and width, position and dimensional change of disc, position of condyle. Timepoint: before placement and one day after correction of the class II molar relationship. Method of measurement: Magnetic resonance Imaging.